Granted Patent B2

US 8,664,422 · App. 13/933,461 · Granted Mar 4, 2014

Abstract

Claims (20)

1. A method to form a silicone composition having a formula: (M 1 ) a (D 1 ) b (D 2 ) c , comprising:

reacting a silicone having a formula (M 1 ) a (D 1 ) p with a cyclic hydrosiloxane of formula (D 5 ) q to form an intermediate organosilicone hydride having a formula (M) a (D 1 ) b , (D 3 ) c , wherein M 1 =R 1 R 2 R 3 SiO 1/2 ; D 1 =R 4 R 5 SiO 2/2 ; and D 3 and D 5 are each R 30 HSiO 1/2 ; wherein R 1 is independently at each occurrence a monovalent hydrocarbon radical comprising a reactive end-group other than an amino group; R 2 , R 3 , R 4 , R 5 , and R 30 are independently monovalent hydrocarbon radicals; and wherein a, b, c, p and q are stoichiometric subscripts that are zero or positive subject to the following limitations: q has a value of greater than or equal to 3; a=2; c is greater than or equal to 1; and

reacting the intermediate organosilicone hydride with an unsaturated polyether to form the silicone composition of formula: (M 1 ) a (D 1 ) b (D 2 ) c wherein D 2 =R 6 R 7 SiO 2/2 ; wherein R 6 comprises a monovalent poly(oxyalkyl) hydrocarbon radical; and R 7 is a monovalent hydrocarbon radical; and wherein a, b, and c are stoichiometric subscripts that are zero or positive subject to the following limitations: a has a value of 2; and c is greater than or equal to 1 wherein the reactive end-groups are selected from the group consisting of hydroxyaromatic radicals, hydroxycycloaliphatic radicals, carboxyaromatic radicals, carboxyaliphatic radicals, carboxycycloaliphatic radicals, epoxyaromatic radicals, epoxyaliphatic radicals, and epoxycycloaliphatic radicals.

2. The method of claim 1 , wherein the unsaturated polyether has a formula

wherein R 9 is a divalent hydrocarbon radical having 2 to 20 carbon atoms; R 10 , R 33 , R 34 , and R 35 are each independently a hydrogen atom or a monovalent hydrocarbon radical having 1 to 20 carbon atoms; d has a value from 1 to 100; e is greater than or equal to zero; and W is a divalent hydrocarbon radical having from one to 60 carbon atoms.

3. The method of claim 2 , wherein R 33 is selected from the group consisting of H and CH 3 ; or mixtures thereof.

4. The method of claim 2 , wherein R 33 is CH 3 .

5. The method of claim 4 , wherein the unsaturated polyether is taken in an amount that is greater than or equal to about 20 mole percent excess relative to the amount of the intermediate organosilicone hydride.

6. The method of claim 2 , wherein the cyclic hydrosiloxane is cyclotetramethyltetrahydrosiloxane.

7. The method of claim 1 , wherein the unsaturated polyether has a formula

CH 2 ═C(R 25 )—CH 2 (—OCH 2 CH 2 ) m (—O 2 CH(CH 3 )) n (—OCH 2 CH(C 2 H 5 )) o —OR 26

wherein R 25 is hydrogen or methyl, R 26 is a hydrogen or monovalent hydrocarbon radical, m is 1 to 20; n is or to 20, and o is from zero to 20.

8. The method of claim 7 , wherein R 25 is hydrogen.

9. A silicone composition prepared from the method of claim 1 .

10. A silicone composition prepared from the method of claim 2 .

11. A silicone composition prepared from the method of claim 3 .

12. A silicone composition prepared from the method of claim 4 .

13. A silicone composition prepared from the method of claim 5 .

14. A silicone composition prepared from the method of claim 6 .

15. A silicone composition prepared from the method of claim 7 .

Assignments (19)